Vulnerability Details CVE-2026-42443
NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, an integer divide-by-zero exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS image where the superblock field fs_ipg (inodes per cylinder group) is set to zero. The parser uses this attacker-controlled value as a divisor without validation, causing an immediate hardware trap and process crash. This vulnerability is fixed in 6.0.1698.0.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 2.7%
CVSS Severity
CVSS v3 Score 3.3
Products affected by CVE-2026-42443
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cpe:2.3:a:m2team:nanazip:5.0.1252.0
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cpe:2.3:a:m2team:nanazip:5.0.1263.0
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cpe:2.3:a:m2team:nanazip:5.1.1252.0
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cpe:2.3:a:m2team:nanazip:5.1.1263.0
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cpe:2.3:a:m2team:nanazip:6.0.1461.0
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cpe:2.3:a:m2team:nanazip:6.0.1621.0
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cpe:2.3:a:m2team:nanazip:6.0.1630.0
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cpe:2.3:a:m2team:nanazip:6.0.1632.0